class Character:
    def __init__(self):
        self.health = 100
        self.energy = 50
        self.position = (0, 0)

    def move(self, direction):
        if direction == 'forward':
            self.position = (self.position[0], self.position[1] + 1)
        elif direction == 'backward':
            self.position = (self.position[0], self.position[1] - 1)
        elif direction == 'left':
            self.position = (self.position[0] - 1, self.position[1])
        elif direction == 'right':
            self.position = (self.position[0] + 1, self.position[1])

    def attack(self):
        print("攻击!")

    def heal(self, amount):
        self.health += amount
        if self.health > 100:
            self.health = 100

    def take_damage(self, amount):
        self.health -= amount
        if self.health < 0:
            self.health = 0